Scummer and blow-off for steam-boilers.



' PATENTED JAN. 29, 1907,.

J. B. BARNES. SOUMMER AND BLOW-OFF FOR STEAM BOILERS.

APPLICATION FILED MAY 19. 1906.

2 SHEETS-SHEET 1.

[zwarwzvza N0. 842,16? PATENTED JAN. 29, 1907.

J. B. BARNES. SGU MMBR AND BLOW-OFF FOR STEAM BOILERS.

APPLICATION FILED MAY 19.1906.

2 SHEETS-SHEET 2.

THE NORRIS PETERS co., vmsmxvcmu, D. c.

JOSHUA B. BARNES, OF SPRINGFIELD, ILLINOIS.

SCUMMER AND BLOW-OFF FOR STEAM-BOILERS.

Specification of Letters Patent.

Patented Jan. 29,1907.

Application filed May 19, 1906. Serial No. 317,756.

To all whom it may concern:

Be it known that I, JOSHUA B. BARNES, a

citizen of the United States, residing at Springfield, in the county ofSangamon and State of Illinois, have invented a new and useful CombinedScummer and Blow-Off Valve for Steam-Boilers, of which the following isa specification.

My invention relates to a device combined with a blow-off valve forsteam-boilers, and especially applicable to a locomotive-boiler forcollecting and expelling the scum and scale producing matter from thesurface of the water in the boiler, and thereby preventing foaming anddeposit of sediment and consequent formation of scale on the flues andplates of the boiler,

The invention consists in features of novelty, as hereinafter describedand claimed,

reference being had to the accompanying drawings, forming part of thisspecification, whereon Figure 1 is a side elevation of the fire-box endportion and steam-dome of a locomotive boiler having my combined scummerand blow-off valve applied thereto; Fig. 2, a vertical transversesection through the boiler on line 2 2 in Fig. 1, showing the scummerand combined parts of the device in corresponding elevation; Fig. 3,a'top plan view, to enlarged scale, of the scummer forming part of myinvention, detached; Fig. 4, a side elevation thereof; Fig. 5, a similarview of the same at right angles to Fig. 4 and corresponding to thatseen in Fig. 2; Fig. 6, a horizontal section, to enlarged scale, throughone of the joints between the sections of the scummer on line 6' 6 inFig. 4; and Fig. 7, a vertical transverse section through the scummer online 7 7 in Fig. 3.

Like letters and numerals of reference denote like parts in all thefigures.

a represents the rear o'r fire-box end portion of a locomotive-boilerhaving its cylindrical shell 1, adjacent to the steam-dome 2, as seen inFig. 1, broken away to show the interior of the boiler thereat.

b is the throttle stand-pipe, (broken away in Fig. 2,) and b the dryipetherefrom to the engine. Beneath an adjacent to the pipes b and b is ahorizontal pipe 0, which is preferably endless and arranged in a circlearound and concentric with the vertical center line of the stand-pipe b,(or eccentric thereto, as the location of the stand-pipe may determine.)

The pipe 0 in the present case is made, preferably, of malleablecast-iron in two semicircular sections which communicate with each otherand are jointed together in any suitable manner, but preferably asfollows: In the ends respectively of each section is formed a circularsocket 3, which is adapted to receive the corresponding end portion of aring 4, composed, preferably, of Babbitt metal, (or other suitablematerial,) and on the outslde of the section adjacent to each socket 3is formed an ear or lug 5, whereby when the two sections of the pipe 0are assembled, as seen particularly in Figs. 3 and 6, with the sockets 3and lugs 5 of one section opposite to the sockets 3 and lugs 5 of theother section, the inner shoulders of the opposite sockets 3 are closedagainst the annular edges of the interposed rings 4 and held thereto soas to form a tight joint-between the sections of the pipe 0 by bolts 6,which are passed through the opposite lugs 5 and tightened thereto bykeys (or nuts) 7, as shown.

Through the wall of the pipe 0 at suitable intervals along the top areholes 8, opening from the interior of the pipe 0 into the bottom part ofpreferably two circular segmental troughs (Z, which correspond to thesections of the perforated pipe 0 and are in the present case integraltherewith, but may be of separate construction and fixed thereon 111 anysuitable manner. The side walls 9 of each trough d incline upward andoutward from and to a suitable height above the perforated pipe 0 andare united to each other by the end walls 9 and by intermediate upperbraces 9", which are preferably integral with the side walls 9, but maybe of separate construction and riveted or otherwise fixed thereto, orthe troughs (1 may be otherwise shaped or dis pensed with entirely andthe perforated pipe 0 only used. In the pipe 0 at one side is a branch10, which is connected by a pipe 1 1 with an elbow 12, fixed to theinside of the boiler-shell 1 at a suitable depth below the water-lineand communicating with the inlet branch of a suitable blow-off valve 6,preferably that described in my application for Letters Patent filed January 8, 1906, Serial No. 295,102, which is fixed to the outside of theboiler-shell 1. and operated by a rod 13, extending therefrom to the cab14 within reach of the engineer, the outlet of the valve 0 communicatingwith a pipe 15, which extends downward therefrom and opens at its lowerend into the atmosphere at any convenient point below the boiler a. Onthe opposite side of the pipe 0 is a boss or stud 16, to which is fixedby screw 1.7 the lower end of an upright hanger 18, having its upper endfixed to the crown of the boiler-shell 1, the hanger 18 and the pipe 11supporting the pipe 0 with its troughs d in the proper position, or sothat the upper edge of the troughs dis level, or thereabout, with thenormal water-line within the boiler a, as shown.

In operation the steam in passing from the steam-dome 2 through thethrottle valve and stand-pipe Z) induces a suction and concentration ofthe matter held in suspension or floating at the surface of the water inthe boiler it toward the troughs d, into which it is drawn and depositedat the bottom thereof onto the perforated portion of the pipe 0, andthereby prevented from settling and accumulating in the form of scale onthe fines and plates of the boiler, and by opening the blow-off valve 6at suitable intervals the impurities are expelled from the troughs d,through the holes 8, into the pipe 0, and thence through the pipe 11,valve 6, and pipe 15 to waste. It is to be here noted, as beforementioned, that, if desired, the perforated pipe 0 may be used withoutthe collectingtroughs (i, in which case the top of the pipe 0 isarranged at the normal level of the water in the boiler, the impuritiesbeing drawn by the suction of the steam thereat over the holes 8 of thepipe 0 and expelled therethrough and from the pipe 0 by the operation ofthe blow-off valve 0 in the same manner and on the same principle asbefore described.

By this invention foaming and the formation of scale in the boiler areprevented and the frequent washing out thereof rendered unnecessary,therebysaving time and money. Moreover, the liability of the fire box tocrack owing to sudden contraction and. expansionfroin extreme changes oftemperature in washing out the boiler is greatly reduced and thestrength and life of the boiler consequently maintained.

What I claim as my invention, and desire to secure by Letters Patent,is- 1. In a device of the character described, the combination with asteam-boiler, of an endless pipe, arranged horizontally therein, atrough located above the said pipe adjacent to the steam-outlet from theboiler, and having openings through the bottom into the said pipe, thesaid trough having its upper edge on a level or thereabout with thesurface of the water in the boiler, a suitable blow-oil valve fixed tothe outside of the boiler and in communication with the said pipe, meansfor supporting the said pipe within the boiler, and for operating thesaid valve, substantially as described and for the purpose set forth.

2. In a device of the character described, the combination with asteam-boiler, of an endless pipe arranged horizontally circular wisewithin the boiler adjacent to the steamoutlet therefrom, and havingperforations through its wall along the top, a trough having its bottomformed by the perforated portion of the said pipe and having its upperedge on a level or thereabout with the surface of the water in theboiler, a suitable blow-off valve fixed to the outside of the boiler andin communication with the said pipe, means for supporting the said pipewithin the boiler, and for operating the said Valve, substantially asdescribed and for the purpose set forth.

3. In a device of the character described, the combination with asteamboiler, of a pipe arranged horizontally therein, and havingperforations through its wall along the top, a trough having its bottomformed by the perforated portion of the said pipe, and having its upperedge on a level or thereabout with the surface of the water in theboiler, and a suitable blow-oil valve in communication with the saidpipe substantially as described.

In. witness whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

. JOSHUA B. BARNES.

Witnesses:

A. P. Mans, E. R. JEFFERY.

